I really like this tinygo project and am trying to figure out how to add support for this neat little thing: https://wiki.makerdiary.com/nrf52840-mdk/

I've managed to add this as target:

{
	"llvm-target": "armv7em-none-eabi",
	"build-tags": ["nrf52840_mdk", "nrf52840", "nrf", "arm", "js", "wasm"],
	"linker": "arm-none-eabi-gcc",
	"pre-link-args": ["-nostdlib", "-nostartfiles", "-mcpu=cortex-m4", "-mthumb", "-T", "targets/nrf52.ld", "-Wl,--gc-sections", "-fno-exceptions", "-fno-unwind-tables", "-ffunction-sections", "-fdata-sections", "-Os", "-DNRF52840_XXAA", "-Ilib/CMSIS/CMSIS/Include", "lib/nrfx/mdk/system_nrf52.c", "src/device/nrf/nrf52.s"],
	"objcopy": "arm-none-eabi-objcopy",
	"flash": "nrfjprog -f nrf52 --sectorerase --program {hex} --reset"
}

And added machine/board_nrf52840-mdk.go (which is just a copy of board_pca10040.go for now)

// +build nrf,nrf52840_mdk

package machine

// LEDs on the nrf52840-mdk (nRF52840 dev board)
const (
	LED  = LED1
	LED1 = 17
	LED2 = 18
	LED3 = 19
	LED4 = 20
)

// Buttons on the nrf52840-mdk (nRF52840 dev board)
const (
	BUTTON  = BUTTON1
	BUTTON1 = 13
	BUTTON2 = 14
	BUTTON3 = 15
	BUTTON4 = 16
)

When I now run: tinygo flash -target=nrf52840-mdk examples/button

I get:

github.com/aykevl/tinygo/src/runtime/runtime_nrf.go:33:12: invalid operation: nrf.UART0 (variable of type *device/nrf.UART_Type) has no field or method PSELTXD

So, obviously, I'm missing something. But, I can't add "nrf52" to the build-tags, because then I get a bunch of re-declaration errors:

GPIO_PIN_CNF_DRIVE_D0S1 redeclared in this block
...

So, anyone here wanna help me adding support for this dev board? I'm new to this code, and figured it would be quicker to ask about this here since I couldn't find anything on the wiki about how to add a new board. Wasn't as straight forward as I thought, unless I'm missing something.

Thanks!